Significance of Hemogram-derived Ratios for Predicting In-hospital Mortality in COVID-19: A Multicenter Study

Overview

Journal Health Sci Rep

Specialty General Medicine

Date 2022 Jun 10

PMID 35686199

Authors

M D Asaduzzaman

Mohammad Romel Bhuia

Zhm Nazmul Alam

Mohammad Zabed Jillul Bari

Tasnim Ferdousi

Affiliations

Soon will be listed here.

Abstract

Background: To address the problem of resource limitation, biomarkers having a potential for mortality prediction are urgently required. This study was designed to evaluate whether hemogram-derived ratios could predict in-hospital deaths in COVID-19 patients.

Materials And Methods: This multicenter retrospective study included hospitalized COVID-19 patients from four COVID-19 dedicated hospitals in Sylhet, Bangladesh. Data on clinical characteristics, laboratory parameters, and survival outcomes were analyzed. Logistic regression models were fitted to identify the predictors of in-hospital death.

Results: Out of 442 patients, 55 (12.44%) suffered in-hospital death. The proportion of male was higher in nonsurvivor group (61.8%). The mean age was higher in nonsurvivors (69 ± 13 vs. 59 ± 14 years, < 0.001). Compared to survivors, nonsurvivors exhibited higher frequency of comorbidities, such as chronic kidney disease (34.5% vs. 15.2%, ≤ 0.001), chronic obstructive pulmonary disease (23.6% vs. 10.6%, = 0.011), ischemic heart disease (41.8% vs. 19.4%, < 0.001), and diabetes mellitus (76.4% vs. 61.8%, = 0.05). Leukocytosis and lymphocytopenia were more prevalent in nonsurvivors ( < 0.05). Neutrophil-to-lymphocyte ratio (NLR), derived NLR (d-NLR), and neutrophil-to-platelet ratio (NPR) were significantly higher in nonsurvivors ( < 0.05). After adjusting for potential covariates, NLR (odds ratio [OR] 1.05; 95% confidence interval [CI] 1.009-1.08), d-NLR (OR 1.08; 95% CI 1.006-1.14), and NPR (OR 1.20; 95% CI 1.09-1.32) have been found to be significant predictors of mortality in hospitalized COVID-19 patients. The optimal cut-off points for NLR, d-NLR, and NPR for prediction of in-hospital mortality for COVID-19 patients were 7.57, 5.52 and 3.87, respectively.

Conclusion: Initial assessment of NLR, d-NLR, and NPR values at hospital admission is of good prognostic value for predicting mortality of patients with COVID-19.

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